Warp stop-motion for looms.



A. E. RHOADES.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED AUG. 4, 191 3.

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Patented Dec. 1, 1914.

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A. E. RHOADES.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED AUG. 4. 1913.

1,1 19,539. Patented Dec.-1,1914.

3 SHEETSSHEET Z.

witnesses- A. B. RHOADES.

WARP STOP MOTION FOR LOOMS, APPLICATION FILED AUG. 4, 1913. 1,1 1 9,539. Patented Dec. 1, 1914.

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.entire weight of each detector is borne by- UNITED STATES PATENT oFFicE;

ALONZQ E. RHOAI DIJS, F HOPEDALE, MASSACHUSETTS, ASSIGNOR TO- DRAIPER G OMIPANY, OFHOPEDALE, MASSACHUSETTS, AGORPORATION OF WARP STOB-MOTIQN FOR LOOMS.

. Specification of Letters Patent.

Patented Dec. 1, 1914.

To all whom it may concern:

Be it known that I, ALoNzo E. Rnonons, of Hopedale, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in arp Stop-Motions for Looms,- of which the following is a specification.

' The reissued Letters Patent of the United States No. 11,923, July 30, 1901, to Coldwell and Gildard, disclose a Warp stop motion which is especially useful in weaving fabrics having a large number of warp threads. The characteristic feature of the Coldwell and Gildard warp stop motion is that the detectors are arranged in two banks suspended from the lower crossing planes of the two sections into which the warp threads are divided by the lease rods, so that each detector is entirelyoutof contact with the threads which pass through the detectors in the other bank. In this way, chafing of the threads by the detectors is prevented and warp breakage, due to the-presence of the detectors themselves, is substantially eliminated. This arrangement of the detectorsv conceals them all from view and this "is equally true of the detectors in their normal suspended position and also when a thread has broken and its detector has dropped. The result is that the weaver loses time in locating the broken thread.- Moreover, the

tector, particularly in, connectionwith the" Coldwell and Gildard type of warp .stop

motion. In addition, the present invention has a wider aspect, since a portion of the advantage is obtained even though. parts ofthe detectors are at all times exposed to view so that all of the characteristics of the Coldwell and Gildard type of warp stop motion are not present. The present improvements are illustrated in the accompanying drawin s wherein- Figure 1 is aplan view o the improved warp stop motion. .Fig. 2 is a side view.

., Fig. 3 is across section on an enlarged scale. Fig. 4. is a detail view of one of the detectors.

as shown in Fig. 3 of eleiamwili'gs, the

ture 6, near its lease rods A and B divide the warp threads into two 3801310118 C and D, crossing each other in two different planes. Beneath the warp threads and between the lease rods are I two pivot rods E and F extending transversely across the loom and beneath all of the warp threads. Upon each of these pivot rods is loosely hung a bank of thin flat sheet metal-detectors, G. Each detecto has an eye a, at its upper end, through wf 'ch one of the warp threads pass, and a pivot aperddle, through which one of the pivot rods or F, loosely passes, so that 4 the detector can .freely swing upon and move along its rod. The lower end, 0, of the detector is heavier than its upper end, this being-partly due to the greater length and width of the lower end and partly to the presence of a lightening slot 03, at the upper end which'together' with the eye a, re-

duces the'weight. Accordingly, the detector is overweighted atits lower end and hence, normally, bears upwardly on'its warp thread as shown in Fig. 3; Normally, both banks of detectors lie in a forwardly slightly in-.

detector is borne by its pivot rod so that only a slight stress is brought to bear upon the thread, thereby enabling the-detectors to be used with the most flimsy and delicate threads. As shown at the righthand side of Fig. 3, the bank of detectors which normally engages the threadsof section C of the warp threads is-maintained clear below the other section D of the warp threads and entirely out. of contact therewith, in -Which respect the principle of the Coldwell and Gildard patent is present. This bank of detectors is effectively prevented from coming in contact with the overlyingv section D of the warp threads by a transverse restraining rod H,'extending across the loom between the two sections of the warp threads and be-' tween the point I of intersection between the two sections and the rear lease rodB.

Thisrod H is close to the upper ends of the detectors of the rear bank and prevents .the upward strainon the warp threads of section G (due,to the overweighted. lower ends-of the detectors) from bringing the upperends of this bank of detectors into contact with the overlying section D. Accord-- .detectors is ent rely up ing1y,this rear bank 0.

concealed under working conditions and while the loom is running. In the event, however, of one of the warp threads of section C breaking, the overweighted lower end of the corresponding detector swings the detector to an upstanding position which is shown as a vertical one in Fig. 3, thereby moving the upper endof this detector between threads of the overlying section D, and thus bringing the upper end of the detector into full sight. Accordingly, when the 100m stops, this upstanding exposed detector acts as a signal to direct the weavers attention to the broken thread. Moreover,

the thread eye, a, of this upstanding detector is wholly above the warp threads where it is readily accessible for the reinsertion through it of the thread. While the illustrated upstanding position is shown as a vertical one, it need not be so, as it suflices that a detector .should swing only far enough to expose its upper end at a conspicuously different place from the. normal position of the upper end.

The forward bank of detectors can be arranged so as to be normally concealed so that" they likewise would be arranged in accord ance with the principle of the Coldwell and Gildard patent. Obviously, this would be the result if the illustrated front lease rod A were of sufficiently greater vertical thickness. It will be noted that no restraining rod similar to the rod H is necessary to aid in withstanding the upward strain of the front bank of detectors because the front lease red A is sufficiently close to the forward ends of the detectors when occupying their illustrated normal forwardly and upwardly inclined position. Fig. 3v of the drawings, however, shows that the detectors of the front bank extend at their forward upper ends slightly; above the section C of the warp threads, thus exposing their extreme upper edges so that the principle of the Coldwell and Gildard warp stop motion is not exhibited. In this case, however, equally with the rear bank of detectors, the weight of the detectors on the warp threads is effectively eliminated, and when a warp thread breaks, its detector assumes the vertical position and acts as a distinguishing signal to facilitate the location of the broken thread by the weaver.

In the case of both banks of detectors, the movement of a detector (when its thread breaks) into an upstanding position is facilitated because the detector has to find and make its way only between one section of the warp threads.

When a thread breaks and its detector assumes ,its vertical upstanding position its lower end is between a fixed serrated back stop J and a serrated vibrating feeler K. There are twoof the back stops J and two of the feelers K in accordance with usual end to a lever which in turn acts upon the shipper handle of the loom to unship it and stop the-loom. The lower end of this rod N, with its connections, are not shown, because constituting no part of the invention. They are shown in the United States Letters Patent to Clement, No. 645,912, March 20, 1900. The follower M is moved in one directionby a cam O on the cam or low shaft P of the loom and in the opposite direction by a spring which is not shown but which is similar to the spring shown in the United States Letters Patent to Draper, N0. 7 97,671, August 22, 1905. l Vhen the warp stop detectors are elevated, the follower M oscillates on its pivot (2, thus vibrating the two feelers K, K. When, however, a warp thread breaks and an upstanding detector obstructs the vibration of one of the feelers, the follower M, is not swung on itspivot e, by the cam 0, but the cam acting upon the follower lifts the rod N and thus stops the loom in the manner set forth in the aforesaid Clemen Patent No. 645,912.

- The several rods E, F, and H, are held at their ends in slotted bearings f, by remov able cotter pins 9, and the lease rods A and B are held at their endsin their supports by removable cotter pins 9, thus enabling the ready removal of the detectors and lease rods for drawing in and facilitating their replacement when a new warp is to be put in the loom.

The detectors, theirpivot rods, the lease rods, the back stops J, and the feelers K are all mounted upon the frame Q, which is adjustably fastened to the side frames R of the loom by means of slots S and bolts T. These connections are shown for one side of the loom only. The same connections are used at both sides of the loom.

I claim 1. A loom having, in combination, lease rods dividing the warp into two intersecting sections; two transverse pivot rods located below the warp and between the lease rods; two-banks of detectors, one for each pivot rod, each detector being loosely hung on one of the pivot rods, being overweighted at its lower end and having a warp thread eye at its upper end, and each detector when threaded occupying a position slightly inclined from the horizontal and extending upwardly and forwardlyfrom its rear end,

and the twosections of warp threads passing through the eyes of the respective banks of detectors on opposite sides of and below their crossing; a restraining rod between the sections of warp threads and between the warp-thread intersection and'the rear lease rod and near the front ends of the rear bank of detectors; a back-stop for each bank oij detectors; and a vibrating feeler ,which encounters a detector when,. on the breakage of its warp thread, it occupies its upstanding position with its lower end between its back stop and feeler.

2..'A loom having, in-combination, lease rods dividing the warp into two intersecting sections; two transverse pivot rods located below the warp and between the lease rods; two banks of detectors, one for each pivot rod, each detector being loosely hung on one of the pivot rods, being. overweighted at its lower end and having a warp threadeye at its upper end, and each detector when a threaded occupying a position slightly inclined from the horizontal. and extending upwardly and forwardly from its rear end,

and the two sections of warp threads passing through the eyes of the respective banks of detectors on opposite sides of and below their crossing; a restraining rod between the sections of warp threads and between the warp-thread intersection and the rear lease rod and near the front ends of the rear bank of detectors; a back-stop for each bank of detectors; and means coiiperating with the lower end of an upstanding detector to stop the loom,

3. A loom having, in combination, lease rods dividing the warp into two intersecting sections; two transverse pivot rods "located below the warp and between the lease rods; two'banks of detectors, one for each pivot rod, each detector being loosely hung on one of the pivot rods, being overweighted at its lower end having a warp thread eye at its upper end, and each detector, when threaded, occupying aposition slightly inclined from the horizontal and the two sections of warp threads passing through the eyes of the respective banks of detectors on opposite sides'of and below their crossing; and a restraining rod between the sections of warp threads and near the ends of the bank of detectors which engages the section of warp threads that passed beneath the restraining rod.

a 4. A loom having, in combination, lease rods dividing the warp into two intersecting sections; two transverse pivot rods located below the warp and between the lease rods; two banks of detectors, onenfor each pivot rod, each detector being loosely hung on one of the pivot rods, being overweighted .at its lower end and having a warpthread eye at its upper end, and each detector, when threaded, occupying aposition slightly infrom the *horizontal and extending overweighted at its lower end and having a.

warp thread eye at its upper end, and, when threaded, occupying a position slightly in clined from the horizontal and extending upwardly and forwardly from its rear end, and the two sections, of warp threads passing through the eyes of the respective banks of detectors on opposite sides of and below their crossing; and means cooperating with an upstanding detector to stop the loom.

6. A loom having, in combination, lease rods dividing the warp into two intersecting sections; two banks of detectors, each detector being pivoted at its middle below both warp sections, being overweighted at its lower end and having a warp thread eye at its upper end, and, when threaded, occupying a position slightly inclined from the horizontal, and the two sections of warp threads passing through the eyes of the respective banks of detectors on opposite sides 1 of and below their crossing; and means cooperating with the overweighted endof an upstanding detector to stop the loom.

7. A loom having, in combination; means for dividing the warp into two sections in different planes; a transverse pivot rod be-- 7 low both sections; a bank of detectors loosely' hungon said pivot rod, each-detector being overweighted at its lower end and having an eye" at its upper end through which passes one of the threads of the lowerwarp 'sec-. tion, the relation of the warp a separation and the detectors being such that, when the threads are normal, the detectors are wholly below the upper warp sections, but, when athread breaks and its detectorlassumes an two warp sections and near the eye ends of -the detectors when intheir normal position which restrains the lower warp sections from upward movement against the upward stress of the detectors; and means cooperating with the lower end of an upstanding detector to stop the loom.

8. A loom having, in combination, means for dividing the warp into two sections-in difierent planes; a transverse pivot rod below both sections; a bank of detectors loosely hung on said pivot rod, each detector being overweighted at its lower end and having an eye at its upper end through which passes one of the threads of the lower warp section, the relation of the warp separation and the detectors being such that, when the threads are normal, the detectors are wholly below the upper warp sections, but, when a thread breaks and its detector assumes an upstanding position, the eye of such detector is above the upper warp section and is exposed to iew; and means cooperating with the lower end of an upstanding detector to stop the loom.

9. A loom having, in combination, means for dividing the warp into two sections in different planes; detectors pivoted at their middles below both warp sections, each detector being overweighted at its lower end and having an eye at its upper end through which passes one of the threads of the lower warp section, the relation of the warp separation and the detectors being such that, when the threads are normal, the detectors are wholly below the upper warp sections, but, when a thread breaks and its detector assumes an upstanding position, the eye of such detector is above the upper warp section and is exposed to view; and means 00- operating with the lower end of an upstanding detector to stop the loom.

10. A loom having, in combination, means for dividing the warp into two sections in ration and the detectors being such that,

when the threads are normal, the detectors are wholly below the upper warp sections, but, when a thread breaks and its detector assumes an upstanding, position, the upper end of such detector is above the upper warp section and is exposed to view; and

means cooperating with the lower end of an upstanding detector to stop the loom.

11. A thin sheet metal warp stop detector having a pivotal aperture at its middle, a thread eye near its upper end and a lightens ing slot between the pivotal hole and the eye, and the lower end below the pivotalaperture being longer and Wider than the upper end above said aperture.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

ALONZO E. RHoADEs Witnesses:

FRANK H. FRENCH, DANA OSGOOD. 

